How To Open Port In Linux Permanently?
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1. Log into your server using SSH as the root user.
2. Check for existing firewall rules using the following command:
iptables –L
3. If you need to open a specific port, use the following command:
iptables –A INPUT –p tcp —dport <portnumber> —syn –j ACCEPT
Replace <portnumber> with the actual port number.
4. Save your changes with the following command: iptables–save > /etc/sysconfig/iptables
5. Test the new configuration with the following command: iptables –L The <portnumber> should now appear in the list.